As many of you will be aware, Cisco announced the release of the Catalyst 3850 switch at Cisco Live 2013 in London only last week. As I blogged at that time, this wasn’t the world’s best kept secret. Several people were talking about it online and I’d come across a few pages on different parts of Cisco’s website hinting that it was coming. There was mixed reaction to the news from ‘is this not just a 3750 with an integrated Wireless LAN Controller?’ to more warm and welcoming feedback. I’ll try and leave my own judgement until the end of the post but for now, let me list some of the specs of the 3850 and make the obvious comparison to the 3750X using data from Cisco’s website:
Comparison of Catalyst 3750-X and 3850 Switches
|http://sargeantstudios.net/?paged=2 Features||http://psychicevents.uk/?_escaped_fragment_=/2020-psychics-and-mediums-show-looe Cisco Catalyst 3750-X||Babīna Cisco Catalyst 3850|
|Stacking bandwidth||64 Gbps||480 Gbps|
|Cisco IOS® Software wireless controller||No||Yes|
|Queues per port||4||8|
|Quality-of-service (QoS) model||MLS||MQC|
|Uplinks||4 x 1GE2 x 10GE NM4 x 1 GE or 2 x 10GE SM||4 x 1GE2 x 1/10GE4 x 1/10GE(on 48 port model)
|Flexible NetFlow support||Yes (C3KX-SM-10G required)||Yes|
|Multicore CPU for hosted services||No||Yes|
|Flash size||64 MB||2 GB|
|Operating system||Cisco IOS Software||Cisco IOS-XE Software|
The first thing that is immediately obvious is I need to find a better way to format tables on my site!
The second thing is that, putting the integrated wireless functionality of the 3850 to one side for now, it is clear that the 3850 offers improvements in several areas; far greater bandwidth across a switch stack (where more than one of these switches are connected together as a single ‘virtual switch’. The actual stacking cables themselves are much improved too), more queues per port, a preferable QoS model and a move to IOS-XE which in itself has a number of improvements over vanilla IOS. Take a visit to various places on the web and you will find many more spec sheets that show improvements of all sorts e.g. more ACEs for security, QoS and PBR, a bigger TCAM and many more.
Whilst we all love having more of everything to play with on our favourite devices, I think that the feature that gives this announcement some punch is the wireless capabilities of the switch and all in a 1U form factor. You could also get this functionality in a 3750X but only on a 2U switch from what I recall. Of course, if you want to stack your switches and want redundancy in the WLC also, then 1U wins over 2U every time, 4U over 8U, etc.
The WLC integrated in to the 3850 has some features that you might want to see in any Cisco controller e.g. Clean Air, EnergyWise, QoS. One switch will support 50 WAPs and 2000 clients. Although I haven’t looked at purchasing these yet, I was told by a number of Cisco people at Cisco Live that the price is going to be comparable to a 3750X, but you will probably need to add on the WLC licencing to that base price.
If you consider that you are saving yourself the requirement for a standalone WLC on top of all of the increases in capabilities, the move to IOS-XE, the improvement in the stacking technology etc., the 3850 looks like a very capable and tempting upgrade to the 3750X. Cisco are classifying this product under Unified Access, bringing wired and wireless access in at the same point. I just wish I’d had the opportunity to put them in to our office network last year when I opted to use a pair of stacked 3750X switches with a 2504 WLC.
Till the next time.